CN104929133A - Deep foundation pit Larsen steel sheet pile bottom sloping support construction method - Google Patents
Deep foundation pit Larsen steel sheet pile bottom sloping support construction method Download PDFInfo
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- CN104929133A CN104929133A CN201510310500.XA CN201510310500A CN104929133A CN 104929133 A CN104929133 A CN 104929133A CN 201510310500 A CN201510310500 A CN 201510310500A CN 104929133 A CN104929133 A CN 104929133A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 91
- 239000010959 steel Substances 0.000 title claims abstract description 91
- 238000010276 construction Methods 0.000 title claims abstract description 37
- 238000000034 method Methods 0.000 claims abstract description 11
- 239000011435 rock Substances 0.000 claims abstract description 9
- 238000013461 design Methods 0.000 claims description 15
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 10
- 229910052742 iron Inorganic materials 0.000 claims description 5
- 238000004162 soil erosion Methods 0.000 claims description 5
- 238000009412 basement excavation Methods 0.000 abstract description 5
- 239000002689 soil Substances 0.000 abstract description 5
- 238000005452 bending Methods 0.000 description 4
- 238000003780 insertion Methods 0.000 description 4
- 230000037431 insertion Effects 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 230000035515 penetration Effects 0.000 description 4
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
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Abstract
A deep foundation pit Larsen steel sheet pile bottom sloping support construction method mainly includes the working procedures of trial sheet piling, surveying, inserted sheet piling, foundation pit excavation, layered mounting support, pile bottom sloping and the like. By methods such as pile bottom sloping support, matched soil bag stacking and concrete cofferdam pouring, potential safety hazards caused by incapability of driving Larsen steel sheets to a designed elevation under the geological condition of decomposed rocks are effectively avoided, construction operation is simple and convenient, construction progress is guaranteed, and construction cost is saved.
Description
Technical field
The invention belongs to the construction method of deep foundation ditch field in decomposed rock geological conditions, particularly the construction method of sloping timbering at the bottom of the stake of a kind of deep foundation ditch Larsen steel sheet pile, also can be applied in similar deep foundation pit construction.
Background technology
In recent years along with the development of communication, the technical barrier that while advanced road and grand bridge are flourish at home, bridge deep foundation pit construction brings comes one after another.Such as Larsen steel sheet pile pounds difficulty, stake end elevation cannot meet design requirement brought potential safety hazard, and long construction period, for effectively solving a deep pit construction difficult problem, ensure construction safety, sloping timbering construction method at the bottom of the stake of a kind of deep foundation ditch Larsen steel sheet pile is provided, ensure that construction safety, saved construction cost.
Summary of the invention
The object of this invention is to provide the construction method of sloping timbering at the bottom of the stake of a kind of deep foundation ditch Larsen steel sheet pile, this method is safe and reliable.
Sloping timbering construction method at the bottom of the stake of a kind of deep foundation ditch Larsen steel sheet pile.
The first step, examination beat Larsen steel sheet pile.
First subsurface rock layer position is detected.The deep foundation ditch scope of each size cushion cap is tentatively determined with reference to design drawing, within the scope of the deep foundation ditch of each cushion cap, Larsen steel sheet pile is beaten in examination, multiple point is beaten in the deep foundation ditch examination of each cushion cap, calculate within the scope of the deep foundation ditch of each cushion cap, the Larsen steel sheet pile elevation of bottom that depth of drive is the most shallow squeezes into absolute altitude spacing H apart from designing requirement, and then calculate put slope width L=(H+0.5 within the scope of the deep foundation ditch of each cushion cap) × 2, (unit is: rice).
Second step, inserted to play Larsen steel sheet pile.
Determine Larsen steel sheet pile inserted to play scope, Larsen sheet pile inserted to play scope and deep foundation ditch scope.
Corresponding each deep foundation ditch, according to the cushion cap of each deep foundation ditch, corresponding working width and length and the width of putting slope width L calculating deep foundation ditch.
Deep foundation ditch length x=cushion cap length+working width+put slope width.Deep foundation ditch width y=cushion cap width+working width+put slope width.After drawing the sideline of each deep foundation ditch (length and width), by each self-corresponding sideline at each deep foundation ditch surveying and locating by root inserted to play Larsen steel sheet pile.
For prevent actual insertion Larsen steel sheet pile and deep foundation pit support sideline deviation excessive, avoid the bending deformation of Larsen steel sheet pile to improve the penetration capability of Larsen steel sheet pile simultaneously, taking during Larsen steel sheet pile inserted to play, direction peg is set, spacing beam mode is constructed.During Larsen steel sheet pile inserted to play, often complete 3 meters of measurement updates 1 time, guarantee the straight cis degree of Larsen steel sheet pile.
3rd step, deep pit digging and supporting.
During deep pit digging, to adopt from ground from top to bottom, stage excavation, the mode of layering supporting, forbids to draw wide open digging.Bracing members is adopted to carry out deep foundation pit support.
Slope is put bottom 4th step, deep foundation ditch.
Bottom each deep foundation ditch, the method for putting slope is all adopted to construct.
The basic principle of putting slope in each deep foundation ditch, squeezes into the most shallow Larsen steel sheet pile root up the position of 0.5 meter start (shown in Fig. 2 a=0.5m), leaves 1 meter, sheet pile face (shown in Fig. 2 b=1m).
The sloping coefficient of 1:2 is adopted to carry out putting slope.
5th step, when soil property is slightly poor, the basis of putting slope is piled earth bag concreting do at the bottom of the stake of Larsen steel sheet pile protect, have soil erosion monitor have the position of distortion can add beat Larsen steel sheet pile, iron plate protection, hand excavated pile protection if desired etc.
In the 3rd described step, cushion cap bottom design absolute altitude can be 6-9m.
H in the technical program can be 0.75-1m.
Examination is beaten in Larsen steel sheet pile and second step and is squeezed into Larsen steel sheet pile and all can utilize 70 tons of pedrail cranes, cooperation DZJ-150 type vibrating hammer.
Its advantage is:
The present invention is by adopting the construction method of sloping timbering bottom deep foundation ditch, effectively solve when to carry out deep foundation pit construction under decomposed rock geological conditions, Larsen steel sheet pile pounds difficulty, stake end elevation cannot meet design requirement brought potential safety hazard, ensure construction speed, save engineering cost.Compare the construction method of other complexity, this method is saving resource more.And coordinate and stack earth bag and the methods such as concreting cofferdam, efficiently solve under decomposed rock geological conditions, constructing operation is easy, has ensured construction speed, has saved construction cost.At the bottom of the stake of deep foundation ditch sheet pile, carry out sloping timbering process, and then meet bearing platform construction requirement.Ensure bearing platform construction safety.
accompanying drawing illustrates:
Fig. 1 is deep foundation ditch top view.
Fig. 2 be at the bottom of sloping timbering schematic diagram.
Fig. 3 is construction flow chart.
Detailed description of the invention
embodiment 1
Sloping timbering construction method at the bottom of the stake of a kind of deep foundation ditch Larsen steel sheet pile, specifically comprises the following steps:
The first step, examination beat Larsen steel sheet pile 2.
First subsurface rock layer 3 position is detected.Tentatively determine the deep foundation ditch scope (long × wide) of cushion cap 1 with reference to design drawing, be respectively: 5.6 × 5.6m.
70 tons of crawler cranes are utilized to coordinate DZJ-150 type vibrating hammer to try to beat Larsen steel sheet pile 2 within the scope of the deep foundation ditch of cushion cap 1, within the scope of the deep foundation ditch of cushion cap 1,10 points are made a call in examination, Larsen steel sheet pile 2 elevation of bottom that within the scope of the deep foundation ditch calculating cushion cap 1, depth of drive is the most shallow squeezes into absolute altitude spacing H=1m apart from designing requirement, so calculate put slope width L=(1.0+0.5) × 2=3.0m.
Second step, inserted to play Larsen steel sheet pile 2.
Determine Larsen steel sheet pile 2 inserted to play scope, Larsen steel sheet pile 2 inserted to play scope and deep foundation ditch scope, deep foundation ditch length x=cushion cap 1 length+working width+put slope width; Deep foundation ditch width y=cushion cap 1 width+working width+put slope width.Corresponding cushion cap 1 size draws: deep foundation ditch length=5.6+1+3.0=9.6m, deep foundation ditch width=5.6+1+3.0=9.6m.
(being defined as 1m in conjunction with design drawing and engineering real work working width), by this sideline surveying and locating by root inserted to play Larsen steel sheet pile 2.
For preventing actual insertion Larsen steel sheet pile 2 excessive with deep foundation pit support sideline deviation, avoiding the bending deformation of Larsen steel sheet pile 2 to improve the penetration capability of Larsen steel sheet pile 2 simultaneously, taking during Larsen steel sheet pile 2 inserted to play, direction peg is set, spacing beam mode is constructed.During Larsen steel sheet pile 2 inserted to play, often complete 3 meters of measurement updates 1 time, guarantee the straight cis degree of Larsen steel sheet pile 2.
3rd step, deep pit digging and supporting.
During deep pit digging, to adopt from ground 5 from top to bottom, stage excavation, the mode of layering supporting, forbids to draw wide open digging.Bracing members 4 is adopted to carry out deep foundation pit support.Cushion cap 1 bottom design absolute altitude 6m.
Slope is put bottom 4th step, deep foundation ditch.
Bottom deep foundation ditch, the method for putting slope is adopted to construct.
The basic principle of putting slope starts at the position squeezing into the most shallow Larsen steel sheet pile 1 root up 0.5m, leaves sheet pile face 1m.
The sloping coefficient of 1:2 is adopted to carry out putting slope.
5th step, when soil property is slightly poor, the basis of putting slope is piled earth bag concreting do at the bottom of stake protect, have soil erosion monitor have the position of distortion can add beat Larsen steel sheet pile 2, iron plate protection, hand excavated pile protection if desired etc.
embodiment 2
Sloping timbering construction method at the bottom of the stake of a kind of deep foundation ditch Larsen steel sheet pile, specifically comprises the following steps:
The first step, examination beat Larsen steel sheet pile 2.
First subsurface rock layer 3 position is detected.Tentatively determine that the deep foundation ditch scope (long × wide) of cushion cap 1 is respectively with reference to design drawing: 67.6 × 9m.
70 tons of crawler cranes are utilized to coordinate DZJ-150 type vibrating hammer to try to beat Larsen steel sheet pile 2 within the scope of the deep foundation ditch of cushion cap 1, within the scope of the deep foundation ditch of cushion cap 1,10 points are made a call in examination, Larsen steel sheet pile 2 elevation of bottom that within the scope of the deep foundation ditch calculating cushion cap 1, depth of drive is the most shallow squeezes into absolute altitude spacing H=0.9m apart from designing requirement, so calculate put slope width L=(0.9+0.5) × 2=2.8m.
Second step, inserted to play Larsen steel sheet pile 2.
Determine Larsen steel sheet pile 2 inserted to play scope, Larsen steel sheet pile 2 inserted to play scope and deep foundation ditch scope, deep foundation ditch length x=cushion cap 1 length+working width+put slope width; Deep foundation ditch width y=cushion cap 1 width+working width+put slope width.
Deep foundation ditch length=67.6+1+2.8=71.4m, deep foundation ditch width=9+1+2.8=12.8m;
(working width is defined as 1m), by this sideline surveying and locating by root inserted to play Larsen steel sheet pile 2.
For preventing actual insertion Larsen steel sheet pile 2 excessive with deep foundation pit support sideline deviation, avoiding the bending deformation of Larsen steel sheet pile 2 to improve the penetration capability of Larsen steel sheet pile 2 simultaneously, taking during Larsen steel sheet pile 2 inserted to play, direction peg is set, spacing beam mode is constructed.During Larsen steel sheet pile 2 inserted to play, often complete 3m measurement update 1 time, guarantee the straight cis degree of Larsen steel sheet pile 2.
3rd step, deep pit digging and supporting.
During deep pit digging, to adopt from ground 5 from top to bottom, stage excavation, the mode of layering supporting, forbids to draw wide open digging.Bracing members 4 is adopted to carry out deep foundation pit support, cushion cap 1 bottom design absolute altitude 9m.
Slope is put bottom 4th step, deep foundation ditch.
Bottom deep foundation ditch, the method for putting slope is adopted to construct.The basic principle of putting slope starts at the position squeezing into the most shallow Larsen steel sheet pile 2 root up 0.5m, leaves sheet pile face 1m.
The sloping coefficient of 1:2 is adopted to carry out putting slope.
5th step, when soil property is slightly poor, the basis of putting slope is piled earth bag concreting do at the bottom of stake protect, have soil erosion monitor have the position of distortion can add beat Larsen steel sheet pile 2, iron plate protection, hand excavated pile protection if desired etc.
embodiment 3
Sloping timbering construction method at the bottom of a kind of deep foundation ditch Larsen steel sheet pile 2, specifically comprises the following steps:
The first step, examination beat Larsen steel sheet pile 2.
First subsurface rock layer 3 position is detected.Deep foundation ditch scope (long × wide) with reference to the preliminary cushion cap of design drawing 1 is respectively: 16 × 5.6m.
70 tons of crawler cranes are utilized to coordinate DZJ-150 type vibrating hammer to try to beat Larsen steel sheet pile 2 within the scope of the deep foundation ditch of cushion cap 1,10 points are made a call in each foundation ditch examination, Larsen steel sheet pile 2 elevation of bottom that within the scope of the deep foundation ditch calculating cushion cap 1, depth of drive is the most shallow squeezes into absolute altitude spacing H=0.75m apart from designing requirement, so calculate put slope width L=(0.75+0.5) × 2=2.5m.
Second step, inserted to play Larsen steel sheet pile 2.
Determine Larsen steel sheet pile 2 inserted to play scope, Larsen steel sheet pile 2 inserted to play scope and deep foundation ditch scope, deep foundation ditch length x=cushion cap 1 length+working width+put slope width; Deep foundation ditch width y=cushion cap 1 width+working width+put slope width.
Deep foundation ditch length=16+1+2.5=19.5m, deep foundation ditch width=5.6+1+2.5=9.1m, by this sideline surveying and locating by root inserted to play Larsen steel sheet pile 2.
For preventing actual insertion Larsen steel sheet pile 2 excessive with deep foundation pit support sideline deviation, avoiding the bending deformation of Larsen steel sheet pile 2 to improve the penetration capability of Larsen steel sheet pile 2 simultaneously, taking during Larsen steel sheet pile 2 inserted to play, direction peg is set, spacing beam mode is constructed.During Larsen steel sheet pile 2 inserted to play, often complete 3m measurement update 1 time, guarantee the straight cis degree of Larsen steel sheet pile 2.
3rd step, deep pit digging and supporting.
During deep pit digging, to adopt from ground 5 from top to bottom, stage excavation, the mode of layering supporting, forbids to draw wide open digging.Bracing members 4 is adopted to carry out deep foundation pit support, cushion cap 1 bottom design absolute altitude 8m.
Slope is put bottom 4th step, deep foundation ditch.
Bottom deep foundation ditch, the method for putting slope is adopted to construct.The basic principle of putting slope starts at the position squeezing into the most shallow Larsen steel sheet pile 2 root up 0.5m, leaves sheet pile face 1m.
The sloping coefficient of 1:2 is adopted to carry out putting slope.
5th step, when soil property is slightly poor, the basis of putting slope is piled earth bag concreting do at the bottom of stake protect, have soil erosion monitor have the position of distortion can add beat Larsen steel sheet pile 2, iron plate protection, hand excavated pile protection if desired etc.Cushion cap 1 bottom periphery is provided with gutter 6.
Claims (7)
1. a sloping timbering construction method at the bottom of the stake of deep foundation ditch Larsen steel sheet pile, is characterized in that comprising the steps:
The first step, examination beat Larsen steel sheet pile (2);
First subsurface rock layer (3) position is detected; Determine the deep foundation ditch scope of each cushion cap (1), within the scope of the deep foundation ditch of cushion cap (1), Larsen steel sheet pile (2) is beaten in examination, within the scope of the deep foundation ditch of each cushion cap (1), multiple point is beaten in examination, calculate the most shallow Larsen steel sheet pile (2) elevation of bottom of the deep foundation ditch scope depth of drive of each cushion cap (1) and squeeze into absolute altitude spacing H apart from designing requirement, so calculate put slope width L=(H+0.5 within the scope of the deep foundation ditch of each cushion cap (1)) × 2m;
Second step, inserted to play Larsen steel sheet pile (2);
Determine Larsen steel sheet pile (2) inserted to play scope, Larsen steel sheet pile (2) inserted to play scope and deep foundation ditch scope,
Corresponding each deep foundation ditch, according to the cushion cap of each deep foundation ditch, corresponding working width and length and the width of putting slope width L calculating deep foundation ditch;
Deep foundation ditch length=cushion cap length+working width+put slope width; Deep foundation ditch width=cushion cap width+working width+put slope width; Draw the sideline of each deep foundation ditch, press corresponding sideline at each deep foundation ditch surveying and locating by root inserted to play Larsen steel sheet pile (2);
3rd step, deep pit digging and supporting;
Slope is put bottom 4th step, deep foundation ditch;
Bottom each deep foundation ditch, the method for putting slope is all adopted to construct;
The position of Larsen steel sheet pile (2) root that depth of drive is the most shallow in each deep foundation ditch up 0.5m starts, and leaves sheet pile face 1m;
The sloping coefficient of 1:2 is adopted to carry out putting slope.
2. sloping timbering construction method at the bottom of a kind of deep foundation ditch Larsen steel sheet pile according to claim 1 stake, is characterized in that: in the 3rd described step, cushion cap (1) bottom design absolute altitude is 6-9m.
3. sloping timbering construction method at the bottom of a kind of deep foundation ditch Larsen steel sheet pile according to claim 2 stake, is characterized in that: described H is 0.75-1m.
4. sloping timbering construction method at the bottom of a kind of deep foundation ditch Larsen steel sheet pile according to claim 3 stake, is characterized in that:
H=1m in the first step;
In 3rd step, cushion cap (1) bottom design absolute altitude is 6m.
5. sloping timbering construction method at the bottom of a kind of deep foundation ditch Larsen steel sheet pile according to claim 3 stake, is characterized in that:
H=0.9m in the first step;
In 3rd step, cushion cap (1) bottom design absolute altitude is 9m.
6. sloping timbering construction method at the bottom of a kind of deep foundation ditch Larsen steel sheet pile according to claim 3 stake, is characterized in that:
H=0.75m in the first step;
In 3rd step, cushion cap (1) bottom design absolute altitude is 8m.
7. sloping timbering construction method at the bottom of a kind of deep foundation ditch Larsen steel sheet pile according to claim 1 stake, is characterized in that:
After the 4th described step, can select on the basis of putting slope, pile earth bag concreting and do to protect at the bottom of stake, monitor there being soil erosion and have the position of distortion to add dozen Larsen steel sheet pile (2), iron plate protection or hole digging pile protection.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510310500.XA CN104929133B (en) | 2015-06-09 | 2015-06-09 | The construction method of sloping timbering at the bottom of a kind of deep basal pit Larsen steel sheet pile stake |
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| CN201510310500.XA CN104929133B (en) | 2015-06-09 | 2015-06-09 | The construction method of sloping timbering at the bottom of a kind of deep basal pit Larsen steel sheet pile stake |
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| CN104929133A true CN104929133A (en) | 2015-09-23 |
| CN104929133B CN104929133B (en) | 2016-11-09 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107326929A (en) * | 2017-08-07 | 2017-11-07 | 中国十七冶集团有限公司 | A kind of method of Duo Cang undergrounds integrated pipe earth excavation under Larsen steel sheet pile supporting |
| CN107503354A (en) * | 2016-06-14 | 2017-12-22 | 五冶集团上海有限公司 | A kind of tower crane goes along with sb. to guard him bracing reinforcement and excavation method |
| CN108179754A (en) * | 2017-12-29 | 2018-06-19 | 上海市机械施工集团有限公司 | The construction method of long and narrow Extra-Deep Foundation Pit system |
| CN108589543A (en) * | 2018-05-14 | 2018-09-28 | 中铁七局集团有限公司勘测设计研究院 | The construction method for building island steel sheet-pile cofferdam formula drilled pile platform suitable for formation geology |
| CN113622434A (en) * | 2021-08-11 | 2021-11-09 | 中建安装集团有限公司 | Construction method for supporting and water stopping of Larsen steel sheet pile of deep foundation pit |
| CN114775664A (en) * | 2022-05-24 | 2022-07-22 | 中铁一局集团有限公司 | Steel sheet pile cofferdam construction method for deep foundation pit and steel sheet pile cofferdam |
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Patent Citations (5)
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| JP2009102818A (en) * | 2007-10-22 | 2009-05-14 | Takenaka Komuten Co Ltd | Connection structure between pillar and steel pipe pile |
| CN202298600U (en) * | 2011-10-21 | 2012-07-04 | 郭根维 | Lassen steel sheet pile for foundation pit supporting and protecting construction |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107503354A (en) * | 2016-06-14 | 2017-12-22 | 五冶集团上海有限公司 | A kind of tower crane goes along with sb. to guard him bracing reinforcement and excavation method |
| CN107326929A (en) * | 2017-08-07 | 2017-11-07 | 中国十七冶集团有限公司 | A kind of method of Duo Cang undergrounds integrated pipe earth excavation under Larsen steel sheet pile supporting |
| CN108179754A (en) * | 2017-12-29 | 2018-06-19 | 上海市机械施工集团有限公司 | The construction method of long and narrow Extra-Deep Foundation Pit system |
| CN108589543A (en) * | 2018-05-14 | 2018-09-28 | 中铁七局集团有限公司勘测设计研究院 | The construction method for building island steel sheet-pile cofferdam formula drilled pile platform suitable for formation geology |
| CN113622434A (en) * | 2021-08-11 | 2021-11-09 | 中建安装集团有限公司 | Construction method for supporting and water stopping of Larsen steel sheet pile of deep foundation pit |
| CN114775664A (en) * | 2022-05-24 | 2022-07-22 | 中铁一局集团有限公司 | Steel sheet pile cofferdam construction method for deep foundation pit and steel sheet pile cofferdam |
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